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REV: 01-05-26 LR <br />session keys are exchanged via RSA key exchange over this <br />connection. AES keys are at least 128 bit, RSA keys at least 1024 <br />bit long. The authorization and instant clearing request is sent to the <br />payment server over this encrypted channel. <br />The Flowbird Tender Retail payment server processes the request <br />and translates it to the format used by the upstream processor. <br />The authorization and instant clearing request are passed on to the <br />upstream processor over an encrypted HTTPS channel. Sensitive <br />authentication data, i.e. Track 2 data, is kept in memory of the <br />server until the transaction has been confirmed by the upstream <br />processor. <br />Once the transaction has been confirmed by the upstream <br />processor, transaction data is cleared from the memory transaction <br />log containing truncated and encrypted PANs are stored in the <br />database. <br />ATTY/AGR.2026.001/EnSight Technologies (Parking Access and Revenue Control System (PARCS)) (Page 149 of 167)